Another witness, who wanted to be identified as Abdulrahman, which is not his real name, told the Press Association: “I managed to get the driver of the van. He wanted to run away and was saying, ‘I want to kill Muslims’.

“So he came back to the main road and I managed to get him to the ground and me and some other guys managed to hold him until the police arrived, for about 20 minutes I think, until the police arrived.”

Picture taken with permission from the Twitter feed of Thomas Van Hulle @Thomasvanhulle showing police activity on the Seven Sisters Road in north London (Thomas Van Hulle/PA)

Abdulrahman claimed the driver said, ‘kill me,’ as he was held on the ground.

The force said in a statement: “The driver of the van – a man aged 48 – was found detained by members of public at the scene and then arrested by police in connection with the incident.

“He has been taken to hospital as a precaution and will be taken into custody once discharged. He will also be subject of a mental health assessment in due course.”

Police at a cordon in north London (Yui Mok/PA)

Some witnesses at the scene said more than one attacker may have been involved. But the Met said: “At this early stage of this investigation, no other suspects at the scene have been identified or reported to police, however the investigation continues.”

The force also dismissed reports that the van driver produced a knife, saying: “At this stage there are no reports of any persons having suffered any knife injuries.”

“My prayers are with the victims and their families. It appears from eyewitness accounts that the perpetrator was motivated by Islamophobia.

“Over the past weeks and months, Muslims have endured many incidents of Islamophobia, and this is the most violent manifestation to date.

“Given we are approaching the end of the month of Ramadan and the celebration of Eid with many Muslims going to local mosques, we expect the authorities to increase security outside mosques as a matter of urgency.

An armed police officer on the cordon (Yui Mok/PA)

“Many will feel terrorised, no doubt be angry and saddened by what has taken place tonight.

“We urge calm as the investigation establishes the full facts, and in these last days of Ramadan, pray for those affected and for justice.”

There has been an increase in hate crime reports since the Manchester Arena bombing and the London Bridge attack.

Prime Minister Theresa May issued a statement saying she would be chairing an emergency meeting on Monday morning and adding: “All my thoughts are with the victims, their families and the emergency services on the scene.”

One resident told the Press Association he jumped out of the way as the van struck pedestrians. The man, who did not want to be named, said: “The gentleman went straight down this road, people were just conversing, talking, just doing what we’re doing.

“And he just came into all of us. There was a lot of people. I was shocked, shocked, shocked. There were bodies around me.”

Abdikadar Warfa said: “I saw a man underneath the van. He was bleeding. My friend said he had to lift the van.

“I was busy with a man who tried to escape. My friend said he said some words, but I didn’t hear it. They (people who were hit) were mostly young. They are very bad.

“I tried to stop him (the suspect), some people were hitting him but I said stop him and keep him until the police came. He was trying to run away but people overpowered him. He was fighting to run away.”

Images of the van showed it was rented from Pontyclun Van Hire in Pontyclun, near Cardiff.

Finsbury Park mosque was once infamous as the stamping ground of hook-handed hate preacher Abu Hamza. But it was raided and shut down and later reclaimed by the local Muslim community, who have transformed it into a place which actively promotes better community relations across faiths.

In 2015, it was the target of an attempted arson when a white man with a jerrycan full of petrol tried to light it and throw it over the railings in front of the site before fleeing on a moped.